export default {
  namespaced:true,
  // state:()=>({
  //   cart: JSON.parse(uni.getStorageSync('cart') || '[]')
  // }),
  state:{cart: JSON.parse(uni.getStorageSync('cart') || '[]')},
  mutations:{
    addToCart(state,goods){
      const findResult = state.cart.find((x)=>x.goods_id === goods.goods_id)
      if(!findResult){
        state.cart.push(goods) 
        this.commit('m_cart/saveToStorage')
      }else{
        findResult.goods_count++
        this.commit('m_cart/saveToStorage')
      }
    },
    saveToStorage(state){
      uni.setStorageSync('cart',JSON.stringify(state.cart))
    },
    updateGoodsState(state,goods){
      const findResult = state.cart.find(x=>x.goods_id === goods.goods_id)
      if(findResult){
        findResult.goods_state = goods.goods_state
        this.commit('m_cart/saveToStorage')
      }
    },
    updateGoodsCount(state,goods){
      const findResult = state.cart.find(x=>x.goods_id === goods.goods_id)
      if(findResult){
        findResult.goods_count = goods.goods_count
        this.commit('m_cart/saveToStorage')
      }
    },
    removeGoodsById(state,goods_id){
      state.cart = state.cart.filter(x=>x.goods_id !== goods_id)
      this.commit('m_cart/saveToStorage')
    },
    updateAllGoodsState(state,newState){
      state.cart.forEach(x=>x.goods_state = newState)
      this.commit('m_cart/saveToStorage')
    }
  },
  getters:{
    total(state){
      let c = 0
      state.cart.forEach(goods => c += goods.goods_count)
      return c
    },
    checkedCount(state){
      return state.cart.filter(x => x.goods_state).reduce((total,item)=>total+=item.goods_count,0)
    },
    checkedGoodsAmount(state){
      return state.cart.filter(x=>x.goods_state).reduce((total,item)=>total+=item.goods_count * item.goods_price,0).toFixed(2)
    }
  },
}